Interference fitted assemblies find wide
engineering applications such as bearing bushes, liners in cylinder blocks and
small end bush in connecting rods. The strength of any such assemblies depends
on various geometric features, amount of interference and other physical
conditions of the mating surfaces. This paper presents the details of analysis
carried out to study the effect of different pin and bush materials, low
temperature (cryogenic) treatment and geometric parameters on stress distribution
at the mating surface of interference fitted assemblies. This work covers,
analysis based on Lame’s approach and finite element method – to evaluate the
principal stresses and Von Mises stresses on the performance of interference
fitted assemblies. For the finite element analysis(FEA), an appropriate finite
element model was developed to analyse the pattern of contact stresses in
interference fitted assemblies with and without low temperature effect and
under varying geometric parameters such as contact length, mating diameter and
amount of interference. A comparative study of both the methods has been
carried out.

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